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How To Create an OS X Lion Install Disc
|
David W. Martin, BYTE | July 24, 2011 02:30 AM
Category: Operating systems, Desktop PCs
Apple now ships OS X 10.7 Lion via the Mac App Store and not on DVD. That's progressive and all, but its digital delivery isn't that convenient.
Think ahead. What if there's an emergency? You might need to do a clean install or reinstall for any number of reasons. It's easy to create your own installation DVD. Here's how.
To get ready, make sure your current Mac is prepared to install Lion. Then download OS X Lion from the Apple App Store.
If you did already install it, then follow Apple's Lion Recovery instructions to re-download OS X Lion again.
The optimum time to make your bootable DVD is early in the install process. Otherwise, you won't be able to get the DMG file you need without having to download OS X Lion all over again.
This is key. The install starts automatically -- you need to stop it. At the initial screen asking if you want to press Continue, DO NOT CLICK CONTINUE!
Just leave the screen up or minimize it, and follow these instructions carefully.
Locate the Mac OS X Lion installer in your Application folder. Right-click and select Show Package Contents.
Open it by double-clicking the Contents folder.
Inside the Contents folder, find the SharedSupport folder. Double-click it to open it.
Find the “InstallESD.dmg” inside the ShareSupport folder. This is the OS X Lion installer disk image you need to burn to disc.
Righ-click it and select copy "InstallESD.dmg".
Then paste it to the Desktop.
Caution: Do not drag this file. You risk damaging the OS X Lion install application. No dragging. Pasting only.
Open the Applications folder in Finder. Double-click on the Utilities folder to open it.
Open the Disk Utility by double-clicking its icon.
Now move the ESDInstall.dmg file from your Finder desktop to Disk Utility, as shown below. Make sure you drop it right into the left-most windowpane inside of Disk Utility.
In Disk Utility, click the Burn icon.
A prompt appears, asking you to insert the destination disc for the installESD.dmg disc image burn. Insert a blank DVD into the drive. Hit Burn.
The process burns the InstallESD.dmg image to the DVD, verifies it and completes. All you have to do is wait for your new OS X Lion install disk to pop out.
If you like, use Disk Utility from the installer to perform a clean installation of Mac OS X Lion. Always proceed with caution, knowing that a clean install is just that -- it completely erases all drive contents.
Store your Lion install DVD somewhere safe. That's all there is to it!
Also think about creating a make your own OS X Lion USB flash drive installer. Apple will be selling one for around $70 in August, but why do that, when you can do it yourself?
Email me with tips and comments. I'd love to hear from you.
Based in Houston, David Martin is a technologist at BYTE. Follow him @David_W_Martin or email him at David.Martin@BYTE.com.
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